Process for transferring information and system for carrying out the process
Patent 4408185 Issued on October 4, 1983. Estimated Expiration Date: 
October 4, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 4, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3462756 3488517 3525078 3594584 3714451 3818466 Method and apparatus for transmitting intelligence over a carrier wave Systems for transmitting information in an alternating current electricity supply system Patent #: 4254403 InventorAssigneeApplicationNo. 06/201024 filed on 07/11/1980US Classes:307/3, Different frequencies or phase340/10.34, Power up340/310.12, Modulation technique340/310.14Zero crossingExaminersPrimary: Caldwell, Sr., John W.Assistant: Crosland, Donnie L. Attorney, Agent or FirmInternational ClassesH04B 3/54 (20060101)H05B 37/02 (20060101) H02J 13/00 (20060101) Foreign Application Priority Data1978-11-13 DKAbstractAn arrangement for transferring both power and information on one or more common AC power lines in which a first type of information is transmitted by terminating the current from the power supply in periods which constitute a fraction of a halfwave cycle. The transmission of this first type of information is dependent upon the frequency of the AC power supply. A second type of information is transmitted during the periods in which the current from the power supply is terminated, and the second type of information is transmitted at a higher frequency independent of that of the AC power supply. | |
